SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '31ef148427b72eab8bbc56f79b3b03ab8dc956e1761936832cf7098d2c6e3002' 
  AND token = 'BfPZO9LjxXPF8G4QtESn/alLKrWoUCqK892ComvPC/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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