How to display items modified 5 minutes ago?

Question

1C-Bitrix

I can't figure out why I can't display items that have changed in the last 5 minutes?

$arSelect = Array("ID", "IBLOCK_ID", "NAME", "DATE_ACTIVE_FROM","PROPERTY_*","TIMESTAMP_X");
$arFilter = Array("IBLOCK_ID"=>$elementIdBlock, "ACTIVE_DATE"=>"Y", "ACTIVE"=>"Y", 'DATE_MODIFY_FROM' =>date($DB->DateFormatToPHP(FORMAT_DATETIME), time()-300));
$res = CIBlockElement::GetList(Array("SORT"=>"ASC"), $arFilter,  false, Array ("nTopCount" => 5), $arSelect);

Answer 1

"DATE_MODIFY_FROM" => ConvertTimeStamp(time() - 300, "FULL")