SELECT 
  * 
FROM 
  cscart_ec_table_booking_system_booking_info 
WHERE 
  status = 'A' 
  AND product_id = 232 
  AND booking_type = 'R'

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}