Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cffa6367270bfa0a4305244f61e4677b903f20181a9d4eaceeaefefddd01b05a' 
  AND token = 'OdoOvEkVTlF4FTi4pE6Nzjdo/0UXLLTO862MWiqAJyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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