Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '972fb554659f5822ec57e53eeaaae87aa2bcb6a1e6e071b7cfdfca83754ffd7e' 
  AND token = '2BDZ9n4I/vB34/xFq7Xf2FyuxEgr5GpMbHw9FrDuSgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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