Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d82b84939c6b118daa62d498d49c97a09c0861670baf30a43b61d06c556404d' 
  AND token = 'UGbOvd8cnq8YJ2YMecopoNY/heB5nuIaXg9lEv0zUr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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