Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a24b47c5d374d249b239e6fb7f7115cbac5ddf36e8ecb5890b76d24bea09761' 
  AND token = 'YjuM2CkvRWls5Ao+IcoDJcSsQimIazxTD4oI4JppIdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}