Wordpress - Make WooCommerce pages accessible for logged in users only

Put this in your functions.php file:

function wpse_131562_redirect() {
    if (
        ! is_user_logged_in()
        && (is_woocommerce() || is_cart() || is_checkout())
    ) {
        // feel free to customize the following line to suit your needs
        wp_redirect(home_url());
        exit;
    }
}
add_action('template_redirect', 'wpse_131562_redirect');

What does it do?
We check if a not-logged-in user wants to see a WooCommerce page, and redirect him/her to our home page.

I just changed the redirection to

wp_redirect( site_url('my-account/') )

so users are redirected on the "My-Account" page if not logged in or registered.