SELECT 
  * 
FROM 
  cscart_ec_extra_product_data 
WHERE 
  product_id IN (
    114, 108, 104, 121, 103, 112, 97, 116, 
    111, 287, 315, 110, 118, 286, 123, 119, 
    100, 289
  )

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "4.70"
    },
    "table": {
      "table_name": "cscart_ec_extra_product_data",
      "access_type": "ALL",
      "rows_examined_per_scan": 13,
      "rows_produced_per_join": 6,
      "filtered": "50.00",
      "cost_info": {
        "read_cost": "3.40",
        "eval_cost": "1.30",
        "prefix_cost": "4.70",
        "data_read_per_join": "260"
      },
      "used_columns": [
        "product_id",
        "maximum_adults",
        "maximum_children",
        "maximum_room_occupancy",
        "minimum_length_of_stay",
        "maximum_length_of_stay",
        "company_id",
        "blocked_date"
      ],
      "attached_condition": "(`pankajecarter_systemfour`.`cscart_ec_extra_product_data`.`product_id` in (114,108,104,121,103,112,97,116,111,287,315,110,118,286,123,119,100,289))"
    }
  }
}