Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7e97c92b62bd12cf8e0e986f81801230fb9d87045a43a4044b0a449487d94df' 
  AND token = 'U7NhzPb4l56m5lqih5USS5IL34qyt1ryjLy4ERn70uQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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