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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 (
    1668, 1669, 1670, 1671, 2220, 2221, 2222, 
    2223, 5353, 5354, 5355, 5356, 5357, 
    5358, 5359, 5360, 5361, 5362, 5363, 
    5364, 5365, 5366, 5367, 5368, 5369, 
    5370, 5820, 5821, 5822, 5823, 12916, 
    12921, 12876, 12896, 12900, 12909
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00033

JSON explain

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