{
  "id": "3885",
  "login": "050111",
  "lastLoginTime": 1529730115000,
  "lastLoginFrom": "192.168.66.230"
}
{
  "id": "3898",
  "login": "050112",
  "lastLoginTime": null,
  "lastLoginFrom": null
}

$ jq -jr --arg ARG1 050111 'select(.login==$ARG1)|"user:", " ",.login,"n","lastlogintime:", " ",(.lastLoginTime / 1000 | strftime("%Y-%m-%d %H:%M UTC")),"n","lastloginfrom:", " ",.lastLoginFrom // "-","n"' test_json3
user: 050111
lastlogintime: 2018-06-23 05:01 UTC
lastloginfrom: 192.168.66.230

$ jq -jr --arg ARG1 050112 'select(.login==$ARG1)|"user:", " ",.login,"n","lastlogintime:", " ",(.lastLoginTime / 1000 | strftime("%Y-%m-%d %H:%M UTC")),"n","lastloginfrom:", " ",.lastLoginFrom // "-","n"' test_json3
user: 050112
jq: error (at test_json3:12): null (null) and number (1000) cannot be divided