Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ad6f1ed138fafa77b3add317f3cf4f3aa70f1d0207983b00fe9c9581644479e' 
  AND token = '1TFA1g8daGXM8FqoUZn8rkJdmsGA3EN2E/pzjpjhb+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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