SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '127b1dd319f47df9e1cdd4fbf6b993680828682a45faadcb4657529afc9f7531' 
  AND token = '7H46IBZYTdK7NDqqVlJHrfRU3K9DAIiJMkWVBLug3YU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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