Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0b40459c632598cea731bb0f9de7c21a6affe85f93f70a0c6ef646ab6ccc86f' 
  AND token = '6ffA7ngSac6pagO06I9VBN91fRIopcXncpFxEefz2fQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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