SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4703f1370a8c1618c6eecbe1c611dc7021fbded979069f4aa5fc619c60b8a13d' 
  AND token = 'Vq/b2/mWSg+5SsqkaYqlO3ThttBdUPKEbpJ5OBxCxrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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