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 (
    63942, 68909, 69380, 69490, 68911, 69486, 
    68924, 68889, 68893, 68913, 68903, 
    68933, 68935, 68936, 69401, 68914, 
    69458, 68890, 69461, 69463, 69485, 
    68900, 68938, 69471
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "13.48"
    },
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "storefront_id"
      ],
      "key_length": "7",
      "rows_examined_per_scan": 24,
      "rows_produced_per_join": 24,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "11.08",
        "eval_cost": "2.40",
        "prefix_cost": "13.48",
        "data_read_per_join": "384"
      },
      "used_columns": [
        "product_id",
        "storefront_id",
        "average_rating",
        "reviews_count"
      ],
      "attached_condition": "((`cscart_db`.`cscart_product_review_prepared_data`.`storefront_id` = 0) and (`cscart_db`.`cscart_product_review_prepared_data`.`product_id` in (63942,68909,69380,69490,68911,69486,68924,68889,68893,68913,68903,68933,68935,68936,69401,68914,69458,68890,69461,69463,69485,68900,68938,69471)))"
    }
  }
}