HTTP Response code for TokenMismatchException in ajax requests

I'm sending my requests to the server using ajax and somehow at times, I may get TokenMismatchException on the server. Now, I want to handle this both on the backend as well as frontend. For this, I think I need to do this:

    public function render($request , Exception $exception)
    {
        //TODO Check the following if() block code validity for production server
        if ($exception instanceof \Illuminate\Session\TokenMismatchException){
            if ($request->expectsJson() ){
                return Response::json([
                    'message'      => 'Token mismatch (CSRF token mismatched)' ,
                    'message-type' => 'danger' ,
                    'new_csrf_token' => csrf_token()
                ], $exception->getStatusCode());
            }
            return redirect()
                ->back()
                ->exceptInput('password')
                ->with([
                    'message'      => 'Validation Token was expired. Please try again' ,
                    'message-type' => 'danger' ,
                ]);
        }

        return parent::render($request , $exception);
    }

Using this JSON response, I want to display a prompt message on the front end as well as update the CSRF token to resend the request.