Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62cdd24d85360eb4d9f32496b9aa08ff512996e5bb1f43df096f29aed2c32849' 
  AND token = '1MqeZZoQlFxTkm5mT25191K0BFhD7NLnVlbimYnJcec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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