Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db3c51e019025175501548b7e8a2d7e8ab93541298c402d4ef4edea5e7603177' 
  AND token = 'F1ztxT45WfWa1RV9X+mJHP5enqkTiph5zLm3/ZZufKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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