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 (
    244, 245, 246, 240, 6, 66, 166, 214, 219, 
    221, 223, 192, 194, 195, 196, 197, 198, 
    199, 200, 201, 202, 203, 204, 205
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00035

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": 24,
      "filtered": "46.15",
      "cost_info": {
        "read_cost": "7.77",
        "eval_cost": "4.80",
        "prefix_cost": "12.57",
        "data_read_per_join": "384"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`danishecarter_latest`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`danishecarter_latest`.`cscart_product_review_prepared_data`.`product_id` in (244,245,246,240,6,66,166,214,219,221,223,192,194,195,196,197,198,199,200,201,202,203,204,205)))"
    }
  }
}