Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f956d1f1cb64f19eac8a182781407f446a4f676b649a876bb15bd0bc89d500d0' 
  AND token = 'N1jp2zZ+ajFEbtrfs+zB6UK/xw8xpC8j+dmqoC30AhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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