Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad633924b57d545b5d36fa9b900376b52bceff3dc5fa09fd1492b493959fc897' 
  AND token = '4SRkQJNyBgbsrxIj+LMBURR0P6BH57paU65T4Prt/tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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