Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e2c9e01e93b76b9f169d1d75c48f58e9a83f3774eeb08cec2dea634415e4eb0' 
  AND token = 'c8ydb9THOYlHQT3jD/z+uInL5Gse5ERi4C2XAig8nl0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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