Featured-sale

$meta_query = array(
	'relation' => 'OR',
	array(
		'key'     => 'pro_featured',
		'compare' => 'EXISTS',
		'type'    => 'NUMERIC',
	),
	array(
		'key'     => 'sale',
		'compare' => 'EXISTS',
		'type'    => 'NUMERIC',
	),
);