Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2706f75c3dc33a6dc6fd19c80baea434f6f18fa139e0920b1623c79a07baf393' 
  AND token = 'Rm+7dd6cxvDc4JRlOO3uuIctWstx0T///7ElH/7z9fM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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