Multiple meta query (AND)

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => '_data_modification_type',
		'value'   => 'value',
		'compare' => '=',
	),
	array(
		'key'     => '_data_modification_status',
		'value'   => 'value',
		'compare' => '=',
	),
);