Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce48106520d63a7efe410e3938d2d408e946da5dce8093debeef82bcbb0936e8' 
  AND token = 'iMJ/gwk/JmFLCOGC48SLYj8Se9cGNsM1uDArWgwTuGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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