Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d5b5222b98253b5abbf3652c98ebce076f05b59385af04d7e3b5673cddad13f' 
  AND token = 'xFN/qQ9aBzYAfGDmi4HBxmoEEoLy6pHf4HUitwwyGlo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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