Rt-crontool, find unanswered tickets


I wish to setup the rt-crontool (RT 3.6.17) to find tickets not
after 6 hours by using the “Told” field.

I am not able to select those ticket because the value of the Told field is
"Not set".

I’ve tried using ‘1970-01-01 00:00:00’ but it does not work.
/opt/rt3/bin/rt-crontool --search RT::Search::FromSQL --search-arg “Queue =
‘network’ AND (Status = ‘new’ OR Status = ‘open’) AND Told <= ‘1970-01-01
00:00:00’” --action RT::Action::Generic --verbose

How can I look for tickets that have not been answered?

Thanks for helping me.