Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ffb7ba878273adad446f7348311b505ce3fa02f3027ac848758e57dfb09b50c' 
  AND token = 'OsWFhhpIK6DLL5Mhet22Kurkp1/TDJgdQh9hU3n91l8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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