Как увеличить производительность при запросе к БД?

$query = "SELECT id, title FROM videos WHERE id > 0";
$result = mysqli_query($link, $query) or die(mysqli_error($link));

$deleteIds = $row['id'];

$deleteIds[] = $row['id'];

$query = "SELECT thumbnail, id FROM videos";
$result = mysqli_query($link, $query) or die(mysqli_error($link));
 
$deleteIds = [];
 
while ($row = mysqli_fetch_assoc($result));
    //проверяем наличие обложки
    $headers = get_headers($row['thumbnail']); 
    if(preg_match("/404/", $headers[0])) {
        $deleteIds[] = $row['id'];
    }   
}
 
if (!empty($deleteIds)) {
    $query = "DELETE FROM videos WHERE  id IN (" . implode(',', $deleteIds) . ")";
    $result = mysqli_query($link, $query) or die(mysqli_error($link));
    if($result) echo 'Success deleted!<br>'; 
}

$result = mysqli_query($link, $query) or die(mysqli_error($link));

<?php
 
set_time_limit(0); // убираем лимит на время выполнения скрипта
 
include 'config.php';
 
 
$link = mysqli_connect($sql_db_host, $sql_db_user, $sql_db_pass, $sql_db_name);
mysqli_query($link, "SET NAMES 'utf8'");
 
// проверяем соединение
 
if($link == false) echo 'Data base connection error' . mysqli_connect_error();
else echo 'The connection is true!<br>'; 
 
$query = "SELECT thumbnail, id FROM videos WHERE id > 0";
$result = mysqli_query($link, $query) or die(mysqli_error($link));
 
$deleteIds = [];
 
while ($row = mysqli_fetch_assoc($result)) {
    //проверяем наличие обложки
    $headers = get_headers($row['thumbnail']); 
    if(preg_match("/404/", $headers[0])) {
        $deleteIds[] = $row['id'];
    }   
}
 
if (!empty($deleteIds)) {
    $query = "DELETE FROM videos WHERE  id IN (" . implode(',', $deleteIds) . ")";
    $result = mysqli_query($link, $query) or die(mysqli_error($link));
    if($result) echo 'Success deleted!<br>'; 
}
 
echo 'end';

if (!empty($deleteIds)) {
    var_dump(count($deleteIds)); die();
 
    $query = "DELETE FROM videos WHERE  id IN (" . implode(',', $deleteIds) . ")";
    $result = mysqli_query($link, $query) or die(mysqli_error($link));
    if($result) echo 'Success deleted!<br>'; 
}