Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52240fbe81373d336f6ea21136671cdff89e5c04559e34cfb166cc2f572e0c42' 
  AND token = 'IINbS5rDLl7kDtIEoEdD0hN7wnypM0MU1E23HDLr2XE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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