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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 (
    18269, 18270, 18271, 18272, 18273, 18274, 
    18275, 18276, 18277, 18278, 18279, 
    18280, 18281, 18282, 18283, 18284
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00058

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 (18269,18270,18271,18272,18273,18274,18275,18276,18277,18278,18279,18280,18281,18282,18283,18284)"
    }
  }
}