I think this could work :

rule "verify time"
      when
            $now: java.util.Date() from getTimeByID(ETimeID.NOW)
            $tc: TaskContext(times contains $now)
      then
            //something
end

or an eval :

rule "verify time"
      when
            $tc: TaskContext(eval( this.getTimes().contains(getTimeByID(ETimeID.NOW)) ))
      then
            //something
end