LNG P2 Sub Meta Query

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'article_tag',
		'value'   => 'sponsored_content',
		'compare' => '=',
	),
	array(
		'key'     => 'article_expiry_date',
		'value'   => '1593478020',
		'compare' => '=',
	),
);