Personally my weapon-of-choice fort his kind of thing is just raw Powershell. It means all your queries will be simple linear-searches, and powershell is a warty-as-hell language, but the ergonomics aren't bad.

For example, the "all the cities in Iran" query.

  Import-FromCsv GeoLite2-City-Locations-en.csv | 
    Where-Object {$_.country_name -eq "Iran"} |
    Select-Object -ExpandProperty city_name

You could probably find modules to help with the IP-aware stuff like `cidr_match`, but the real place where it would probably fall over probably performance when joining, since you'd probably be just be doing O(n*m) convolution operations.