SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '570ec95cc7b984599b5fc388527d592edda81c54719b861d07d28e70a276f51f' 
  AND token = 'kKoG7uXhAJsOl9Z6rmegl5UBa6ElD/cBCRItkgRrjTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}