SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    5438, 5818, 40309, 5770, 1751, 37294, 
    6604, 41358, 40754, 2086, 31734, 3854, 
    36476, 1436, 5167, 1266, 798, 37302, 
    61, 37284, 45573, 28115, 41368, 1542, 
    41124, 3464, 4865, 41387, 62, 27939, 
    4938, 1669
  )

Query time 0.00174

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_products",
          "access_type": "range",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 32,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (5438,5818,40309,5770,1751,37294,6604,41358,40754,2086,31734,3854,36476,1436,5167,1266,798,37302,61,37284,45573,28115,41368,1542,41124,3464,4865,41387,62,27939,4938,1669)"
        }
      }
    ]
  }
}