Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '403246019ad58e8e1d31e608d5c3bef3cb55f7dbb7bb5a09b58f926ce93c100c' 
  AND token = 'Pp5sOR1DCxt/Ze61qvWuse2ck168ShY6k+mM2E6RwGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}