Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f575660cef70c31d2b124451f618d76d961ea7f148f687196779a7d66965a991' 
  AND token = 'DAy2hq2Zu76NDFfBGZP+ix2NRvPxx5asJoNciR8Ruyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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