Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '019d9d7affad5026ae8fbbc7c6effd8d072ebea1aa3d51f24b9aa95e62f0746b' 
  AND token = '3220VaukZ3I46CZWUb5mDG/XIjKgKDTitwxDQcbAo4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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