SELECT 
  cscart_product_review_prepared_data.product_id AS product_id, 
  cscart_product_review_prepared_data.average_rating AS average_rating, 
  cscart_product_review_prepared_data.reviews_count AS reviews_count 
FROM 
  cscart_product_review_prepared_data 
WHERE 
  cscart_product_review_prepared_data.product_id IN (
    18, 16, 4, 5, 23, 24, 1, 22, 25, 6, 8, 14, 
    9, 10, 19, 21
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "12.56"
    },
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": [
        "PRIMARY"
      ],
      "rows_examined_per_scan": 52,
      "rows_produced_per_join": 15,
      "filtered": "30.77",
      "cost_info": {
        "read_cost": "9.37",
        "eval_cost": "3.20",
        "prefix_cost": "12.57",
        "data_read_per_join": "255"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`danishecarter_25_march`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`danishecarter_25_march`.`cscart_product_review_prepared_data`.`product_id` in (18,16,4,5,23,24,1,22,25,6,8,14,9,10,19,21)))"
    }
  }
}