Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfbf202db383b6b9b23e104bc060b4db0f2ae06209ea35ce1eb1219854e5e256' 
  AND token = 'ghAvnCf0ulUwE4qAMctVY/kVN2gpO6DdjkJ/H4EYPwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}