Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c0ac22b529b61369eb4fbab368eb6c32e85bca453b002b4092547dc4ea6cfd2' 
  AND token = 'CBZQdSD5q28UtmP8FDrKFVXN60huYwmMc3ZrflozGGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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