### Description

The [Get API key information API](https://www.elastic.co/guide/en/elasticsearch/reference/master/security-api-get-api-key.html) can currently filter the returned keys by:
 * key id/name
 * keys owned by the calling user
 * keys owned by other users, by `realm_name` and `username`

Irrespective of the filtering used, both invalidated and expired (but not yet deleted) keys will be included in the response.
In the response, keys have the `invalidated` boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.

I propose we introduce a way for the API to support retrieving:
* only valid API keys (not return invalidated keys) - using a boolean request parameter
* keys not expired before a certain timestamp - using a timestamp parameter that defaults to "now" - also note that keys' experiation date is always checked against the local node's clock
x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/security/action/apikey/GetApiKeyRequest.java
"neither username nor realm-name may be specified when retrieving owned API keys",
                    validationException
                );
            }
        }
        if (Strings.hasText(apiKeyId) && Strings.hasText(apiKeyName)) {
            validationException = addValidationError("only one of [api key id, api key name] can be specified", validationException);
        }
        return validationException;
    }
    @Override
    public void writeTo(StreamOutput out) throws IOException {
        super.writeTo(out);
        out.writeOptionalString(realmName);
        out.writeOptionalString(userName);
        out.writeOptionalString(apiKeyId);
        out.writeOptionalString(apiKeyName);
        if (out.getTransportVersion().onOrAfter(TransportVersion.V_7_4_0)) {
            out.writeOptionalBoolean(ownedByAuthenticatedUser);
        }
        if (out.getTransportVersion().onOrAfter(TransportVersion.V_8_5_0)) {
            out.writeBoolean(withLimitedBy);
        }
    }
    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {