Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b54dead44e297b881dc14834d7bb4e4ca480f1d2a9e2084ea9882ea181e5f73' 
  AND token = 'qZM2oGkisUfcg7XKclofUxll1lxBa+lAN2tNnmjFX0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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