SELECT 
  rf_rent 
FROM 
  netting_categories 
WHERE 
  category_id IN (466) 
  AND rf_rent = 'Y'

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}