Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f0fefe6de038aa0eb3afdb6955e4e30de49c4d2472ab8c81a56e6f6968ad569' 
  AND token = 'eMjy5NFqPig04QRxdeU9luLoKx89ts+ZwqFws4MYMJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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