SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '9dc425ae609130eb8306c78163618841f716983b5aad632190ab1f18c27751cc' 
  AND token = 'Bk9t2vqjZIKzHZ4wcJ7j7yNafMa3pSejjZ/J0vicYGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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