MySQL Update eines Datensatz mit Variable

$sql = "UPDATE Mail SET verified='1' WHERE token = '$token'";  

$token = htmlspecialchars($_POST['token']);  


$servername = "localhost";  
$username = "xxxxxxxxxxxxxxxxxxxx";  
$password = "xxxxxxxxxxxxxxxxxxxx";  
$dbname = "xxxxxxxxxxxxxxxxxxxxx";  


// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);  
} 

$sql = "UPDATE Mail SET verified='1' WHERE token = '$token'";  


if ($conn->query($sql) === TRUE) {
    echo "Deine Adresse wurde verifiziert. Enjoy.";  
} else {
    echo "Error: " . $sql . "<br>" . $conn->error;  
}

$conn->close();