Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69364ddb84ec564a60e48647e3f3494e31a887b195a34d5a0456fa66669461f9' 
  AND token = 'NZsznkcleajT5qIz+/+NRpWqwDp6wMFTNZgY0k40izk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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