Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1af9b4faa5ea0352b6697bb2a73adca9ddbcc57185627ae8260db9209dcbc8e8' 
  AND token = 'c5qQVELq3NXMGK6yGoHJxRlwN5Ckq+LU9gJa0Py+HvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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