Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a54235d160e04231a85ef779dd0520918ce6e3e7f988b245881e3bc28f435e8' 
  AND token = 'uoSTPOtne5mqgo/ceMkyhONBHZ6QitqN+5ukbVmXlBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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