Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2724689992cc2b20f7708a041cda1a0a533e2a1ea32dbc7df6bb3a4c7134a6de' 
  AND token = 'k95BAEhK1ZghUbnHj48IzXy1Vd2xNTZbvHgGK4ZmZJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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