Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '732a53979c984557ecbe74a76ddca1eabca8b91b004cfa33318dbfb1fb6911b7' 
  AND token = 'MI8FpJGjkaMH4CbGQLIaC0NQIsxW1aOPkBWKtcVGF8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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