Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2418a12d07a8efa3c11c57e8c30643d7f14f11a33f197d5ed3edaedfcc450e08' 
  AND token = 'qsj12uNz5xG28SdZUIvIhbIl7nY1h3ZAP4E2Z4pDzMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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