SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '14ae21534fa729b2ad5e93235355868337ba38e8cacfdd449f051e1257c4ba3b' 
  AND token = '3qn04Og6gk9sUwoUt1NOwZmXKvmJVfDFXH6l9M7uQp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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