Ok, making var private fixed the problem.

Here is what I have:

SELECT COUNT(Trans.cTrans_pk) as iAccounts_Count, ;
IIF(not IsNull(Trans_Employees_Queues.cCommission_Owner_UsGrLink_fk), ;
Trans_Employees_Queues.cCommission_Owner_Usgrlink_fk, ;
Trans_Employees_Queues.cUsGrLink_fk) as cUsGrlink_pk, ;
SUM(Trans.yCurrent_balance_amount)  as yBalance ;
FROM TRANS
INNER JOIN Trans_employees_queues   ;
ON Trans.cTrans_pk = Trans_employees_queues.cTrans_fk ;
INNER JOIN Employee_queue_schedules ;
ON Trans_employees_queues.cTrans_employees_queues_pk = ;
Employee_queue_schedules.cTrans_employees_queues_fk ;
WHERE Trans.cResolution_Codes_fk is Null ;
AND Employee_queue_schedules.tScheduled_time <= {^2006-05-02 23:59:59} ;
AND Trans_employees_queues.iActive_Flag = 1  ;
AND Employee_queue_schedules.iActive_Flag = 1  ;
AND ;
IIF(not IsNull(Trans_Employees_Queues.cCommission_Owner_UsGrLink_fk), .T., ;
(Trans_employees_queues.iTemporary_Assignment_Flag = 1    AND ;
Trans_employees_queues.tStart_Date <= {^2006-05-02 23:59:59}   AND ;
Trans_employees_queues.tExpire_Date >= {^2006-05-02 23:59:59}))
GROUP BY 2

Using index tag Crescod_fk to rushmore optimize table trans
Rushmore optimization level for table trans: full
Rushmore optimization level for table trans_employees_queues: none
Using index tag Tschedtime to rushmore optimize table employee_queue_schedules
Rushmore optimization level for table employee_queue_schedules: partial
Joining table trans and table trans_employees_queues using index tag Ctrans_fk
Joining intermediate result and table employee_queue_schedules using index tag Cempque_fk

BTW, when I removed GROUP BY, I got the same time (69 sec.)