SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bb0747ae48e5337e33c27fa8179b10cbbbff090dad52b35a548a6e3d0bc2ce98' 
  AND token = 'mQ6JUaK7jZzlTW1znHxPTKx5o40QjNDxiEQGhY1ZmwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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