Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd3e8fd0055aa502f0d8dd3957e26f61317b168561c9c2e1d48a75f2bfd2a89' 
  AND token = 'uE+lb9Xo1PlcmkSssOt43ZFd2ZO5j6MK8E7IFAh9un4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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