Php calling an API in background through windows service

I have developed an automated workflow that insert each process entry in sqlserver table and there is windows service which is calling a PHP URL and that URL is checking if there is anything in the table zero then it executes some functions and do the actions.

Now the point is that if there are multiple records having zeros then this service will call the PHP URL multiple times.

Any idea to improve or enhance this approach. Is there can be a deadlock in this approach.

via Chebli Mohamed