Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab34c2794607eb3d5b150d261388bb3e452b9676b2ef249e403a6db5c7c01617' 
  AND token = 'TcyfevRQiIuEJpZK5I6zVvG/6n2kIlT9rs9tNh7frOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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