<form id="qty" class="cart single-product" method="post" enctype='multipart/form-data' action="/checkout?set-cart-qty_<?php echo $product->id;?>=2">
<button id="buynow" type="submit" data-toggle="tooltip" data-placement="bottom" title="<?php echo get_option('tooltip_text');?>" class="single_product_buy_now single_add_to_cart_button button alt cart-buttton buy-now">Buy Now</button>
<input type="hidden" name="add-to-cart" value="<?php echo esc_attr( $product->id ); ?>" />