The object CTP/Calib/OrbitReset should exist for the mentioned timestamp:
o2-ccdb-downloadccdbfile --host http://alice-ccdb.cern.ch -p CTP/Calib/OrbitReset -t 1635659148972
[INFO] Is alien token present?: 1
Querying host http://alice-ccdb.cern.ch for path(s) CTP/Calib/OrbitReset ... and timestamp 1635659148972
Info in <TJAlienConnectionManager>: Opening connection to JCentral. Please wait
Info in <TJAlienConnectionManager>: Opening connection to 137.138.99.139
Info in <TJAlienConnectionManager>: Successfully connected to 137.138.99.139
Info in <TJAlienFile::Open>: Accessing file /alice/data/CCDB/CTP/Calib/OrbitReset/02/31550/cad957b0-3a0d-11ec-8119-0aa14064250c in SE <ALICE::CERN::EOS>
[TFile::Cp] Total 0.00 MB |====================| 100.00 % [0.0 MB/s]
As Ruben said, you need a valid ALIEN token/certificate. Check output of alien-token-info.