Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad22f111c117b3d377e572375f95eeb2aed62c6d0fa497c69ac74c0ab00ee0c0' 
  AND token = 'EKD7ZrxO5j52ou9EF1/yDlUYytuwPe4Go49bWOxOERA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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