Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c582228be2c6459374a8fd220fb6f91ff9aa71a7491ce663b93845db52e74bb' 
  AND token = 'ZMwHcqKGcEiOPaeIU2BmOItuWI+Le9PCt6qC9W0UFN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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