SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  products.amount, 
  descr1.product as product, 
  companies.company as company_name, 
  variation_group_products.group_id AS variation_group_id, 
  products.product_type, 
  products.parent_product_id, 
  products.master_product_offers_count, 
  products.master_product_id, 
  products.company_id, 
  IF(
    products.age_verification = 'Y', 
    'Y', 
    IF(
      netting_categories.age_verification = 'Y', 
      'Y', netting_categories.parent_age_verification
    )
  ) as need_age_verification, 
  IF(
    products.age_limit > netting_categories.age_limit, 
    IF(
      products.age_limit > netting_categories.parent_age_limit, 
      products.age_limit, netting_categories.parent_age_limit
    ), 
    IF(
      netting_categories.age_limit > netting_categories.parent_age_limit, 
      netting_categories.age_limit, netting_categories.parent_age_limit
    )
  ) as age_limit 
FROM 
  netting_products as products 
  LEFT JOIN netting_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'en' 
  LEFT JOIN netting_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN netting_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN netting_categories ON netting_categories.category_id = products_categories.category_id 
  AND (
    netting_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, netting_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, netting_categories.usergroup_ids
    )
  ) 
  AND netting_categories.status IN ('A', 'H') 
  AND netting_categories.storefront_id IN (0, 1) 
  LEFT JOIN netting_warehouses_sum_products_amount as war_sum_amount ON war_sum_amount.product_id = products.product_id 
  INNER JOIN netting_product_variation_group_products AS variation_group_products ON variation_group_products.product_id = products.product_id 
  LEFT JOIN netting_master_products_storefront_offers_count AS master_products_storefront_offers_count ON master_products_storefront_offers_count.product_id = products.product_id 
  AND master_products_storefront_offers_count.storefront_id = 1 
WHERE 
  1 
  AND (
    companies.status IN ('A') 
    OR products.company_id = 0
  ) 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND variation_group_products.group_id IN (15) 
  AND products.master_product_status IN ('A') 
  AND products.master_product_id = 0 
  AND (
    products.company_id > 0 
    OR (
      master_products_storefront_offers_count.count > 0
    )
  ) 
  AND products.cp_is_installment_product = 'N' 
  AND products.product_type != 'D' 
GROUP BY 
  products.product_id 
ORDER BY 
  NULL asc

Query time 0.00154

JSON explain

{
  "query_block": {
    "select_id": 1,
    "temporary_table": {
      "nested_loop": [
        {
          "table": {
            "table_name": "war_sum_amount",
            "access_type": "system",
            "possible_keys": ["PRIMARY"],
            "rows": 0,
            "filtered": 0,
            "const_row_not_found": true
          }
        },
        {
          "table": {
            "table_name": "master_products_storefront_offers_count",
            "access_type": "system",
            "possible_keys": ["PRIMARY", "idx_storefront_id"],
            "rows": 0,
            "filtered": 0,
            "const_row_not_found": true
          }
        },
        {
          "table": {
            "table_name": "variation_group_products",
            "access_type": "ref",
            "possible_keys": ["PRIMARY", "idx_group_id"],
            "key": "idx_group_id",
            "key_length": "3",
            "used_key_parts": ["group_id"],
            "ref": ["const"],
            "rows": 2,
            "filtered": 100,
            "attached_condition": "variation_group_products.group_id <=> 15"
          }
        },
        {
          "table": {
            "table_name": "products",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY", "status", "idx_master_product_id"],
            "key": "PRIMARY",
            "key_length": "3",
            "used_key_parts": ["product_id"],
            "ref": ["pucuda_cscart.variation_group_products.product_id"],
            "rows": 1,
            "filtered": 95.66918945,
            "attached_condition": "products.master_product_id = 0 and (products.usergroup_ids = '' or find_in_set(0,products.usergroup_ids) or find_in_set(1,products.usergroup_ids)) and products.`status` = 'A' and products.master_product_status = 'A' and products.company_id > 0 and products.cp_is_installment_product = 'N' and products.product_type <> 'D'"
          }
        },
        {
          "table": {
            "table_name": "descr1",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY", "product_id"],
            "key": "PRIMARY",
            "key_length": "9",
            "used_key_parts": ["product_id", "lang_code"],
            "ref": ["pucuda_cscart.variation_group_products.product_id", "const"],
            "rows": 1,
            "filtered": 100,
            "attached_condition": "trigcond(descr1.lang_code = 'en')"
          }
        },
        {
          "table": {
            "table_name": "companies",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY"],
            "key": "PRIMARY",
            "key_length": "4",
            "used_key_parts": ["company_id"],
            "ref": ["pucuda_cscart.products.company_id"],
            "rows": 1,
            "filtered": 100,
            "attached_condition": "trigcond(companies.`status` = 'A' or products.company_id = 0)"
          }
        },
        {
          "table": {
            "table_name": "products_categories",
            "access_type": "ref",
            "possible_keys": ["PRIMARY", "pt"],
            "key": "pt",
            "key_length": "3",
            "used_key_parts": ["product_id"],
            "ref": ["pucuda_cscart.variation_group_products.product_id"],
            "rows": 3,
            "filtered": 100
          }
        },
        {
          "table": {
            "table_name": "netting_categories",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY", "c_status", "p_category_id"],
            "key": "PRIMARY",
            "key_length": "3",
            "used_key_parts": ["category_id"],
            "ref": ["pucuda_cscart.products_categories.category_id"],
            "rows": 1,
            "filtered": 100,
            "attached_condition": "(netting_categories.usergroup_ids = '' or find_in_set(0,netting_categories.usergroup_ids) or find_in_set(1,netting_categories.usergroup_ids)) and netting_categories.`status` in ('A','H') and netting_categories.storefront_id in (0,1)"
          }
        }
      ]
    }
  }
}