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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 (
    10256, 10257, 10274, 10275, 10282, 10285, 
    10293, 10294, 10295, 10297, 10301, 
    10303, 10306, 10307, 10309, 10315
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 5,
      "filtered": 100,
      "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (10256,10257,10274,10275,10282,10285,10293,10294,10295,10297,10301,10303,10306,10307,10309,10315)"
    }
  }
}