Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b33cf6251576a388ab04fbb725be1896db90f801b57d9dba5ab0d029d6e0cd7' 
  AND token = 'w3pfIaYmltehOUYFCafwBvm1hpamqSTtIWlUWy9Ci2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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