How to determine the domains registered in the last 10 minutes?

[Remitur]

There is a certain operation that must be performed at least 5 minutes after the registration of some domains.

I could use the AfterCronJob hook, check the domains registered in the last 10 minutes, and then proceed with this operation on those domains (if any), but... how can I identify the domains registered in the last 10 minutes? I haven't been able to find any way to do it...

[WHMCS Solution]

You can create one custom table where you maintain the domain register with hook PreRegistrarRegisterDomain with date and time 
https://developers.whmcs.com/hooks-reference/domain/#preregistrarregisterdomain

 

Then write cron for every 10 min, get record from your database table do the needful operation 

[RadWebHosting]

It would possibly benefit you to create a custom field associated with domain to store timestamp of registration.

Then each 10 minutes, check custom field value of the most recent/highest domain if the value satisfies the requirement.

If false, stop querying.

If true, repeat query, highest domain id not previously checked within this cron. Repeat until a false is returned.