Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e5d4a8c6e72c3142b87046dc02a4dcd3c60c1a8f78cf228b963c194476d2177' 
  AND token = 'uGBSzqGfjcGe5IAi6z1qkthGjFx09Uv7BEjvwpVWr7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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