https://codecanyon.net/item/woocommerce-direct-checkout/28179405

WooCommerce Direct Checkout is a plugin to allow the steps reduction inside Woocommerce checkout process. You are able to simplify the checkout process by skipping the shopping cart page. The “Add to cart” button is added in each product to redirect customers to the checkout page. This can encourage buyers to shop more and quickly. You will increase your sales reducing cart abandonment.