Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6406316947c4f1c0aa8a6cd175d6cc0e2adc924cfda3d74dc615042ed8320957' 
  AND token = '3Uyu5BKbJYpvJZUsqURucnWxGTnDy8YLKFcx5HHsqis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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