Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a4ebd37fa43770e1b74d870b23b4a1edbd7fbdca97f25a18f22bcc510de8db9' 
  AND token = 'sYiIoI/ErADru0CEF6IXSFmYHwypWkKX5xgvMBf5zcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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