Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2799cbecd4c1454c3d84848b8957f1f4b2a6e94aea4295cb790f4fd2e213e258' 
  AND token = 'bb146+nnigPpYEujtgoK+Uyi8Fc3Ie0I1XyKguGgTW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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