Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dff2eb99cf3cdf2414a47f32fca1648e2e785f2265a4b82bf6045f65a7b9be8f' 
  AND token = 'F2MyAtpyDfBhbKnG69r/QhN81gDgVWNYaoQvTrLmlhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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