Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be903fabe0907fb280bd0968af73b18bb681917d96204bb4669d941aa72eb533' 
  AND token = 'rBz2yTT+CV4qZ+cL9e03F6p7FdLk0JjFSdyfAowpD54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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