SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    10577, 10576, 10575, 10573, 10572, 10569, 
    10568, 10567, 10566, 10565, 10563, 
    10561, 10560, 10558, 10557, 10556, 
    10552, 10551, 10550, 15943
  )

Query time 0.00051

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 20,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (10577,10576,10575,10573,10572,10569,10568,10567,10566,10565,10563,10561,10560,10558,10557,10556,10552,10551,10550,15943)"
    }
  }
}