Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c23ff9ce31048ce8494d38d426ac8412110d390ca5b8113aa3895818b9bc7666' 
  AND token = 'n9euOuAqfiqEiZfS69WRl3eU7HC7c8bRuns56WQwCBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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