Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '415f95bb9a4944c73f47b6d237b2edf54fa67f1aa8a0861d5d5fb6a41eb24033' 
  AND token = 'ZndwmNf/hr4QJwYe0JpQSPpOMrAlfEajTc9yM3W2VSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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