Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '754fb5be35193cdf18af878e807d838354872dead911900ffc40a6fccaa26d05' 
  AND token = 'Xnw1y0ICvkpdc1kKlJsexgVs/5Lci5djRjRWY7e5B88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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