Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01e38470856b8ed024854c409cc15a1b7d35e97d9c312c025208c4c23dcea6ca' 
  AND token = '5WY+nvc/oONZxuDeabFKVj7laY6WdLdsauKydZeFkYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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