Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71115acabd4f97f148feb8424e60db0add776cdc1ed4ddb72b53cc8ad6a6653a' 
  AND token = 'e7xHlI9wm/2BCZ2edYTav+gqAJ6HRIBlzbkgKyza6aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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