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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 (
    484, 309, 691, 693, 310, 311, 559, 475, 
    313, 588, 593, 314, 645, 644, 499, 703, 
    316, 595, 533, 511, 534, 517, 515, 516
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00004

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 133,
      "filtered": 18.04511261,
      "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (484,309,691,693,310,311,559,475,313,588,593,314,645,644,499,703,316,595,533,511,534,517,515,516)"
    }
  }
}

Result

product_id	average_rating	reviews_count
314	0.00	1
311	2.50	2
313	1.25	4
499	4.00	1
595	5.00	1