Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05b9ec8b2022f786e0061caf1ca98b09f2d433557ee318660e6902f0bfd36c46' 
  AND token = 'B25ahkeeKqp6sS7ReIsLSWa4S46Wq/Z9qWDYY7iOC5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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