Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4e27acf18c75f03a9fb3844807336d526cef4300bef97d04f7583558a08dc19' 
  AND token = 'WSzZPSz0JFCp1nugGjQQHjMMsOV4jv4bECMy5yvjWDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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