Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f382c8e1b07c9ab10ab64a88fbe3edddc621faf3918cfae958f1f054f50d2a6' 
  AND token = 'pxe9KVl92JOFpk8Sxk0EhO4DYCpUDuVvXpgdC/EWzcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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