PHP Schedule/ Trigger

I needed help for php schedule/trigger in order to change a specific column data. My table consists of 3 coulmns id, blockTime and blockState. blockTime is of data type date/time where by the time where the blocking time starts, and the blockState is set to Yes. After 5 minutes, the blockState should change to No and blockTime to Null for each id. That is if blockTime is 1 00, at 1 05 it should change the blockState. Is it feasible ? If yes, can anyone help me out? Thank you.