<?php 

add_action( 'woocommerce_product_meta_start', 'add_quick_order_form' ) ;

function add_quick_order_form() {
    global $product;
    if ( $product->is_in_stock() ) {
        echo do_shortcode('[contact-form-7 id="30549" title="⚡ Бърза поръчка"]') ;
    }
}