SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ac3381375bac7495e61fe118052056e2aef6998edb7ab436b6da53d84ac4ed1a' 
  AND token = 'l8kHuw9Rz24/t0g+2ZJs0DY43uFw/LDb+YLqoLvInOg=' 
  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"
    }
  }
}