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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 (
    19899, 20209, 20162, 20163, 20164, 20211, 
    20165, 20210, 20160, 20161, 20017, 
    20018, 20020, 20021, 20022, 20019, 
    19936, 19937, 19938, 19926, 19928, 
    19927, 19956, 19957
  ) 
  AND cscart_product_review_prepared_data.storefront_id = 0

Query time 0.00045

JSON explain

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