SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    11059, 6813, 6919, 6920, 6921, 6923, 
    6922, 11211, 10640, 8865, 21995, 22344, 
    21996, 20369, 20370, 20371, 8000, 6704, 
    6740, 6751, 6769, 6743, 6777, 6781
  )

Query time 0.00115

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": 24,
          "filtered": 100,
          "index_condition": "cscart_products.product_id in (11059,6813,6919,6920,6921,6923,6922,11211,10640,8865,21995,22344,21996,20369,20370,20371,8000,6704,6740,6751,6769,6743,6777,6781)"
        }
      }
    ]
  }
}