Payroll Worker Process running slow

EBS 12.1.3 RDBMS 11.2.0.3.0

Payroll Worker Process is taking more than 8 hours to complete.This database is running on Exadata server.

Most of the time it is running followign query

SELECT EEV.SCREEN_ENTRY_VALUE

  FROM PAY_INPUT_VALUES_X IV, PAY_ELEMENT_ENTRY_VALUES_F EEV

WHERE     EEV.ELEMENT_ENTRY_ID = :B2

       AND IV.INPUT_VALUE_ID = EEV.INPUT_VALUE_ID

       AND IV.NAME = :B1

Cell Single block physical read is highest wait event for above query.Explain plan is using Indexes.

Any help to tune the program is greatly appreciated.

Thanks in advance.