Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f9d533b70ebc5e3a527616da348b41030b08d0ae8df537cab73894028de5c83' 
  AND token = 'MM+a6xqmDDH7YDSh9ian8R9ub+wReWBdao3fIqoR2lM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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