SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    350, 1044, 351, 3992, 4373, 2155, 23481, 
    36474, 1358, 38136, 3981, 4383, 3982, 
    2248, 36303, 38151, 4384, 36302, 49186, 
    2247, 36308, 2152, 4376, 1847, 38553, 
    36301, 2251, 36305, 5632, 33809, 1841, 
    43651
  )

Query time 0.00278

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 (350,1044,351,3992,4373,2155,23481,36474,1358,38136,3981,4383,3982,2248,36303,38151,4384,36302,49186,2247,36308,2152,4376,1847,38553,36301,2251,36305,5632,33809,1841,43651)"
        }
      }
    ]
  }
}