Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91c17a8f8b1e7dd3c50637a3d5c6785ce5f53f07841061c96d9032056c474f65' 
  AND token = 'Qp7AwksbBbs4jEEetACHk/OGbcemkt/zfAvcW4GBqSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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