- INDEX `priority_created` (`priority`,`created`),
- INDEX `done_executed` (`done`,`executed`)
+ INDEX `priority_created_next_try` (`priority`,`created`,`next_try`),
+ INDEX `done_priority_executed_next_try` (`done`,`priority`,`executed`,`next_try`),
+ INDEX `done_executed_next_try` (`done`,`executed`,`next_try`),
+ INDEX `done_priority_next_try` (`done`,`priority`,`next_try`),
+ INDEX `done_next_try` (`done`,`next_try`)