SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    6274, 48559, 40381, 48557, 1267, 35177, 
    1977, 119, 27356, 35167, 35165, 35174, 
    35176, 35173, 35170, 35172, 2291, 35171, 
    6092, 40382, 118, 1982, 36272, 47656, 
    44423, 1585, 35168, 47824, 35166, 35169, 
    5992, 1535
  )

Query time 0.00459

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 (6274,48559,40381,48557,1267,35177,1977,119,27356,35167,35165,35174,35176,35173,35170,35172,2291,35171,6092,40382,118,1982,36272,47656,44423,1585,35168,47824,35166,35169,5992,1535)"
        }
      }
    ]
  }
}