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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 (
    148, 149, 242, 243, 134, 135, 156, 154, 
    155, 133, 132, 146, 147, 145, 157, 153, 
    140, 141, 144, 143, 142
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_review_prepared_data",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 52,
      "filtered": 40.38461685,
      "attached_condition": "cscart_product_review_prepared_data.storefront_id = 0 and cscart_product_review_prepared_data.product_id in (148,149,242,243,134,135,156,154,155,133,132,146,147,145,157,153,140,141,144,143,142)"
    }
  }
}

Result

product_id	average_rating	reviews_count
242	3.50	2
148	4.33	3
149	4.67	3