SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    1450, 1446, 1454, 1455, 1456, 1457, 1458, 
    1461, 1466, 1467, 1468, 1469
  )

Query time 0.00059

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": 12,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (1450,1446,1454,1455,1456,1457,1458,1461,1466,1467,1468,1469)"
    }
  }
}