Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f920e64af5baccc66eb021be121cf4aab0093d8dd6cc7709451e44eff7da07a' 
  AND token = 'qxJIXCrSytvx1/nDQW+Hsa1xvEhnbfM3Pg5NV3/UzLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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