No, Ctrl+Double Click is not available as command for being mapped to keyboard. But this is no problem. You can use a script or a macro stored in a macro file which is automatically loaded on startup with a hotkey you like for fast execution to select a string of interest according to your own rules. For example following macro works for your example.
The macro property
Continue if search string not found must be checked for this macro.
HexOff
IfCharIs "0123456789
:ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz"
UnixReOff
Find MatchCase RegExp Up "[~0-9
:A-Z_a-z]"
IfNotFound
Top
EndIf
Find MatchCase RegExp "[0-9
:A-Z_a-z]+"
EndIf
See also
Customize Select Word to include a dash, a dollar sign, or any other character as word char.