Error comparing hours past 00:00:00?

Question

I have the following code that makes the calculation to see if the deadline has expired for example ORDER TIME -> 23:20:00 AND DELIVERY TIME 23:59:00 but when it passes 00:00 the deadline returns as if it had not expired, only when it is past the deadline again on the other day that it has expired, would anyone know how to solve?

<?php
date_default_timezone_set('America/Bahia');
$prazo_final = date('H:i:s', strtotime('+'.$row["tempo_pedido"].'minute', strtotime($row["hora_pedido"])));
$hora_agora = date('H:i:s');

$converte_prazo_final = strtotime($prazo_final);
$converte_hora_agora = strtotime($hora_agora);


    if($converte_hora_agora>$converte_prazo_final){
        echo "o prazo expirou!";
    }