atkp-product & shop_id
// WP_Query arguments $args = array( 'post_type' => array( 'atkp_product' ), 'meta_query' => array( 'relation' => 'AND', array( 'key' => 'atkp_product_shopid', 'value' => '58', 'compare' => '=', 'type' => 'CHAR', ), ), ); // The Query $query = new WP_Query( $args );