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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 (
    306, 316, 307, 311, 514, 515, 516, 427, 
    319, 320, 531, 322, 325, 326, 410, 327, 
    323, 324, 328, 329, 330, 535, 333, 390, 
    280, 689, 281, 283, 641, 309, 691, 693
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00261

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 133,
      "filtered": 24.06015015,
      "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (306,316,307,311,514,515,516,427,319,320,531,322,325,326,410,327,323,324,328,329,330,535,333,390,280,689,281,283,641,309,691,693)"
    }
  }
}

Result

product_id	average_rating	reviews_count
281	0.00	1
306	3.00	3
307	1.67	3
311	2.50	2
323	0.00	1
325	3.00	3
326	2.50	2