Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cd519ee933a5c24cbf1eb4df2bf8259b34fc860d6e4a11728b0a990c87e4218' 
  AND token = '6gYOnclyzpdIOwUo9YQUR/RcLL0M03pA3du3XmlOJLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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