The calculated distance (air line) between Mazār-e Sharīf and Qarqīn is approximately 77 miles respectively 123 kilometers.
By car or train, the actual journey to Qarqīn is certainly longer, as only the direct route (as the crow flies) between Mazār-e Sharīf and Qarqīn has been calculated here.
Air line (approximately)
123 kilometers
67 nautical miles