SELECT
 `v`.`id`, GROUP_CONCAT(DISTINCT `vv`.`parameters_values_id` 
order by `vv`.`id`) AS `values`, `price`,`price_pv`,`price_fs`,`price_sk`,`price_cs`, 
 `v`.`code`, `v`.`ean`, `v`.`price_buy`, `v`.`in_stock_count`, COUNT(`vv`.`id`) AS `vCount`,
`v`.`weight`, `v`.`mall_param1`, `v`.`mall_param2`, 
 `v`.`mall_param_value1`, `v`.`mall_param_value2`, `v`.`mall_param_value1_sk`,
`v`.`mall_param_value2_sk`, `v`.`in_stock_count_mall`,`price_hu`, `v`.`ardon_assigned`, `v`.`active`
FROM `products_variants` AS `v`
LEFT JOIN `products_variants_values` AS `vv` ON `vv`.`variants_id`=`v`.`id`
WHERE `v`.`products_id`=1408 AND `v`.`active`=1
GROUP BY `v`.`id`
HAVING COUNT(`vv`.`id`)=1
ORDER BY `vv`.`parameters_values_id` ASC