Generic Tax Query (AND)

$tax_query = array(
	'relation' => 'AND',
	array(
		'taxonomy'         => 'taxkey2',
		'terms'            => array( 'taxterm', 'texterm2' ),
		'field'            => 'slug',
		'operator'         => 'AND',
	),
	array(
		'taxonomy'         => 'keytax',
		'terms'            => 'terms',
		'field'            => 'slug',
		'operator'         => 'NOT IN',
	),
);