### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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/security/src/test/java/org/elasticsearch/xpack/security/authc/ApiKeyServiceTests.java
);
            assertEquals("invalid ApiKey value", e.getMessage());
        }
    }
    public void testAuthenticateWithApiKey() throws Exception {
        final Settings settings = Settings.builder().put(XPackSettings.API_KEY_SERVICE_ENABLED_SETTING.getKey(), true).build();
        final ApiKeyService service = createApiKeyService(settings);
        final String id = randomAlphaOfLength(12);
        final String key = randomAlphaOfLength(16);
        final User user, authUser;
        if (randomBoolean()) {
            user = new User("hulk", new String[] { "superuser" }, "Bruce Banner", "hulk@test.com", Map.of(), true);
            authUser = new User("authenticated_user", "other");
        } else {
            user = new User("hulk", new String[] { "superuser" }, "Bruce Banner", "hulk@test.com", Map.of(), true);
            authUser = null;
        }
        final ApiKey.Type type = randomFrom(ApiKey.Type.values());
        final Map<String, Object> metadata = mockKeyDocument(id, key, user, authUser, false, Duration.ofSeconds(3600), null, type);
        final AuthenticationResult<User> auth = tryAuthenticate(service, id, key, type);
        assertThat(auth.getStatus(), is(AuthenticationResult.Status.SUCCESS));
        assertThat(auth.getValue(), notNullValue());
        assertThat(auth.getValue().principal(), is("hulk"));
        assertThat(auth.getValue().fullName(), is("Bruce Banner"));
        assertThat(auth.getValue().email(), is("hulk@test.com"));
        assertThat(auth.getMetadata().get(AuthenticationField.API_KEY_CREATOR_REALM_NAME), is("realm1"));
        assertThat(auth.getMetadata().get(AuthenticationField.API_KEY_CREATOR_REALM_TYPE), is("native"));
        assertThat(auth.getMetadata().get(AuthenticationField.API_KEY_ID_KEY), is(id));
        assertThat(auth.getMetadata().get(AuthenticationField.API_KEY_NAME_KEY), is("test"));
        assertThat(auth.getMetadata().get(API_KEY_TYPE_KEY), is(type.value()));