Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9589a65307b2930965e7398bdfa17b0c12f983417061495cdd422615ff4e76f' 
  AND token = 'xXGniOvJneXeXNeRHHGxdTF4iQ0Q2FBwNBrMI4wQeS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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