Wrong "No matching keys found" on export

On a new computer (`nexy`), I tried to import my main GPG key like that:

```
❯ keybase pgp export -q 04460cd228df9e0d42f07643992eb6fafd4e6361 --secret
▶ ERROR No matching keys found
```

As you can see, it does not work. But I can still download the private key from the keybase.io app and import it manually. It makes no sense to me, what is the issue?

Plus, it seems I still can't use it directly, for exemple for passwordstore:

```
❯ pass path/to/auth
gpg: decryption failed: No secret key
```

But the needed key is here:

```
sec rsa4096 2019-03-06 [SC]
04460CD228DF9E0D42F07643992EB6FAFD4E6361
uid [ unknown] Sullivan Senechal
uid [ unknown] Sullivan Senechal
ssb rsa2048 2019-03-06 [E] [expires: 2027-03-04]
ssb rsa2048 2019-03-06 [SA] [expires: 2027-03-04]
```

FYI: All works for the other key.

Start by reproducing `keybase pgp export -q 04460cd228DF9E0D42F07643992EB6FAFD4E636 --secret` with the key details shown in the report, then compare the result with the working key and with `gpg` decryption through passwordstore. Done means the export no longer incorrectly reports no matching keys and the exported secret key can decrypt the reported passwordstore entry.

Written by the indexing model from the issue text.