you should use initial check point value (part of the query) for this field "access_timestamp ". Then the query uses this as checkpoint and fetches the data after that.
The query looks good. what about the settings?
I assume you are using access_timestamp as rising column. Did you set up the initial check point value for this field ?
@anilchaithu - I used access_timestamp but the query was not working with rising column, so we have added one more select statement in the start of the query. Now it is working fine.