Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '937851723f5786810bb23d50ef561a4d713ba60948de24f98054e616e935a3c2' 
  AND token = 'ivDqgbtq1+7btorwdkPlZ9feoijtHd7Qb9W79cJFHhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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