Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4d4bcdd022b968cc08323e2026c89712b1b2e0e9fd76a250f567ae24569e467' 
  AND token = 'H12RQeAydeCMfZl6kMRWRUU/ktD68g97WNkDYi37kFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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