Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '355ec55384b8729005191289ef497e6778a968e95e5fc1ea57ef1eefb3ed30c2' 
  AND token = '94HIA5H85Fbm6ZdVdVPZQ7HkwoohhGiB40TQ8s0UuVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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