Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9456e15d9e8f1f87c82b789a5da4564bd66d38927fa4fac00ec19080f2fea2b' 
  AND token = 'a6xTgNyhQQTIzMbL95iKnsaYWSqHYDlNBmmvm87bO3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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