Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f5bf4caf5e293012aa7dab9e18c3af1ac9d0a19a89e405622feafa1a104f2e8' 
  AND token = 'XxngSsS76K0FnzCWXwNYC1r39M347s96vNG6/uwia6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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