SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6d45148ee9e4ced6c71cfc69f69f68ce1478eb0ebf980503f59bf0f7e73d23ba' 
  AND token = 'Z4B/6PQnfrH4h2B7BuhVzU9zLCYmKFNEs6rfLJl08RM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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