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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 (
    2521, 2522, 2523, 2524, 2525, 2526, 2527, 
    2608, 2609, 2610, 2611, 2612, 2613, 
    2614, 2615, 2616, 5872, 5873, 5874, 
    5875, 5940, 5941, 5942, 5943
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "Impossible WHERE noticed after reading const tables"
  }
}