Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b5ce7c192687d0deb8c9725eb19f1b5c8abbfa1e945b41281595dd4687b4d84' 
  AND token = 'AYp4d7fPJnLnaMtvRn7Bod1Au8fJcI58N+gx6gTIUnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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