Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e4cf1ace67f245f1cc5b69dc240cc1717239f177fb8ec19a106a2362d9ff41c' 
  AND token = '9TmAzYtm8Ujxweht4tJTXvsZp31DOiTjgqTa52gDnZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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