Check for database change with SSE - php

Question

Trying to create a small notification system. When user fills out the profile then his verification status is set to 1 in database and then I would like to show a notification once that "hey you are now verified". Been searching a lot on the internet, but nothing has helped me to reach my goal. If the status is 1 in database I get the Event: verification_ok in the test.php but if it is 0 I get Maximum execution time of 120 seconds exceeded. Also I don't see any response in my client side code.
This is the server side code (test.php).
<?php
header('Content-Type: text/event-stream');
header('Cache-Control: no-cache');
header("Connection: Keep-alive");
require_once $_SERVER['DOCUMENT_ROOT'].'/PHP/scripts/no_session_redirect.php';
$key = true;
$ver = $user_home->runQuery("SELECT verification_status FROM verification WHERE user_id=:user_id");
$ver->execute(array(":user_id"=>$user_id));
$status = $ver->fetch(PDO::FETCH_ASSOC);
while($key){
if($status["verification_status"] == 1){
pushNotification($status["verification_status"]);
$key = false;
}else{
$status["verification_status"];
sleep(10);
}
}
function pushNotification() {
echo "Event: verification_ok\n";
}
And here is the client side code:
$(document).ready(function() {
if (typeof(EventSource) !== "undefined") {
// Yes! Server-sent events support!
var source = new EventSource("test.php");
source.addEventListener("verification_ok", function(e) {
console.log(e.data);
}, false);
source.addEventListener("open", function(e) {
}, false);
source.addEventListener("error", function(e) {
if (e.readyState == EventSource.CLOSED) {
console.log("Error - connection was lost.");
}
}, false);
} else {
// Sorry! No server-sent events support..
}
});