Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3598acaf132bd6955069e840e0ee0409876ad1b80bf05da6273616e18a2d6ed7' 
  AND token = 'DzxNqBoJbLGRP6/7XchmWVGNaN/Vl8m45eJqQcbXvAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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