Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad4151d45ff0add17f211b60d36eaf9efc964f22eb04caff0ee3c0fbdd0c3394' 
  AND token = 'D86S18IY+3PYmKwNI3cRpHDqjsdp9FXDtraXY8vzq08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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