Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2364b688e39ecab4a526681d1e37acfaadc8d0962bc6aaf050485ba3aa643d28' 
  AND token = 'aK6zqVPsK29bxhYztYuA82+WlFTHcVRQtnQfxuQEQkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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