_shipping_country

$meta_query = array(
	'relation' => 'OR',
	array(
		'key'     => '_shipping_country',
		'value'   => 'VE',
		'compare' => '=',
		'type'    => 'CHAR',
	),
	array(
		'key'     => '_shipping_country',
		'value'   => 'CO',
		'compare' => '=',
		'type'    => 'CHAR',
	),
);