### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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
when(client.threadPool()).thenReturn(threadPool);
        doAnswer(inv -> {
            final Object[] args = inv.getArguments();
            @SuppressWarnings("unchecked")
            final ActionListener<BulkResponse> listener = (ActionListener<BulkResponse>) args[2];
            final IndexResponse indexResponse = new IndexResponse(
                new ShardId(INTERNAL_SECURITY_MAIN_INDEX_7, randomAlphaOfLength(22), randomIntBetween(0, 1)),
                createApiKeyRequest.getId(),
                randomLongBetween(1, 99),
                randomLongBetween(1, 99),
                randomIntBetween(1, 99),
                true
            );
            listener.onResponse(
                new BulkResponse(
                    new BulkItemResponse[] { BulkItemResponse.success(randomInt(), DocWriteRequest.OpType.INDEX, indexResponse) },
                    randomLongBetween(0, 100)
                )
            );
            return null;
        }).when(client).execute(eq(BulkAction.INSTANCE), any(BulkRequest.class), any());
        final Cache<String, ListenableFuture<CachedApiKeyHashResult>> apiKeyAuthCache = service.getApiKeyAuthCache();
        assertNull(apiKeyAuthCache.get(createApiKeyRequest.getId()));
        final PlainActionFuture<CreateApiKeyResponse> listener = new PlainActionFuture<>();
        service.createApiKey(authentication, createApiKeyRequest, Set.of(), listener);
        final CreateApiKeyResponse createApiKeyResponse = listener.actionGet();
        assertThat(createApiKeyResponse.getId(), equalTo(createApiKeyRequest.getId()));
        final CachedApiKeyHashResult cachedApiKeyHashResult = service.getFromCache(createApiKeyResponse.getId());
        assertThat(cachedApiKeyHashResult.success, is(true));
        cachedApiKeyHashResult.verify(createApiKeyResponse.getKey());