Widget which returns always post_type...

With widget below I get this query:
SELECT   wp_posts.* FROM wp_posts
  INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id )
WHERE 1=1  AND wp_posts.post_name = 'sidebar'
      AND (
  ( wp_postmeta.meta_key = '_visibility'
    AND CAST(wp_postmeta.meta_value AS CHAR)
        IN ('catalog','visible')
  )
)
      AND wp_posts.post_type = 'product'
      AND ((wp_posts.post_status = 'publish'))
GROUP BY wp_posts.ID
ORDER BY wp_posts.post_date DESC

I want this query:
SELECT   wp_posts.* FROM wp_posts
  INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id )
WHERE 1=1 AND ( ( wp_postmeta.meta_key = '_visibility'
    AND CAST(wp_postmeta.meta_value AS CHAR)
        IN ('catalog','visible')
  ) ) wp_posts.post_type = 'product'
      AND ((wp_posts.post_status = 'publish'))
GROUP BY wp_posts.ID
ORDER BY wp_posts.post_date DESC

class Products_By_Current_Cat_Widget extends WC_Widget {

    /**
     * Constructor
     */
    public function __construct() {
        $this->widget_cssclass    = 'woocommerce products_by_currenct_cat';
        $this->widget_description = __( 'Display a list of your products on current product page from its parent directory.', 'lauksva' );
        $this->widget_id          = 'products_by_currenct_cat';
        $this->widget_name        = __( 'Current Product Parent Category Products', 'lauksva' );
        $this->settings           = array(
            'title'  => array(
                'type'  => 'text',
                'std'   => __( 'Products', 'lauksva' ),
                'label' => __( 'Title', 'lauksva' )
            ),
            'number' => array(
                'type'  => 'number',
                'step'  => 1,
                'min'   => 1,
                'max'   => '',
                'std'   => 5,
                'label' => __( 'Number of products to show', 'lauksva' )
            ),
        );

        parent::__construct();
    }

    /**
     * widget function.
     *
     * @see WP_Widget
     *
     * @param array $args
     * @param array $instance
     */
    public function widget( $args, $instance ) {
        if ( $this->get_cached_widget( $args ) ) {
            return;
        }

        global $product;

        $current_prod_id = $product->id;

        $current_product_cat = current(get_the_terms($current_prod_id, 'product_cat'))->term_id;

        $args['posts_per_page'] = !empty( $instance['number'] ) ? absint( $instance['number'] ) : '';
        $args['post_status']    = 'publish';
        $args['post_type']      = 'product';
        unset($args['post_name']);

        $args['ignore_sticky_posts'] = 1;

        $args['meta_query'] = array(
            array(
                'key'           => '_visibility',
                'value'         => array('catalog', 'visible'),
                'compare'       => 'IN'
            )
        );

        $args['tax_query'] = array(
            'taxonomy'  => 'product_cat',
            'field'     => 'term_id',
            'terms'     => $current_product_cat,
            'operator'  => 'IN'
        );

        $args['orderby']  = 'date';

        $vals = new WP_Query( $args );

        echo "<pre>";
        var_dump($vals->request);
        echo "</pre>";

        ob_start();

        if ( ( $products = $vals ) && $products->have_posts() ) {
            $this->widget_start( $args, $instance );

            echo apply_filters( 'before_products_by_currenct_cat_widget', '<ul class="product_list_widget">' );

            while ( $products->have_posts() ) {
                $products->the_post();
                $is_active = get_the_ID() == $current_prod_id?'product-active':'';
                wc_get_template( 'content-widget-product-custom.php', array( 'show_rating' => false, 'is_active'=>$is_active ) );
            }

            echo apply_filters( 'after_products_by_currenct_cat_widget', '</ul>' );

            $this->widget_end( $args );
        }

        wp_reset_postdata();

        echo $this->cache_widget( $args, ob_get_clean() );
    }


}

function register_products_by_current_cat_widget() {
    register_widget( 'Products_By_Current_Cat_Widget' );
}

add_action('widgets_init', 'register_products_by_current_cat_widget');