Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d485481b97130d4606885adb2627be9a797894bbe3e5c3f6f681be0fa9ad4bc' 
  AND token = 'f45S+BYfTz1H/dGgdx7v9mEkBGRIu3s8iqTQSGKW3fk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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