no snl_hearing_date_verified value

$meta_query = array(
	'relation' => 'AND',
	array(
		'relation' => 'OR',
		array(
			'key'     => 'snl_hearing_date_verified',
			'compare' => 'NOT EXISTS',
		),
		array(
			'key'     => 'snl_hearing_date_verified',
			'compare' => '=',
			'type'    => 'CHAR',
		),
	),
);