Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa74cb77fb065c9e70151bd7b52141f4c54b75b74e4a69469c0bede3360e58ad' 
  AND token = 'rObXyZmLvUTqtvzcS8N7vXo1bio7AfBXr+nVyOf9jQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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