Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '32d28cfb5f1d51f486fc8cb617e6ef73e52f8222f3b71b921c2200dcf4a27300' 
  AND token = 'eNLbnk3oSTWw13FnghU5y517NB3GwZRIvGDxWCScGV0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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