Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24f4e360e0041d266e8b090c9373d092a3b3948820242e8a9928e2006cd82575' 
  AND token = '7jDidV+ROSihPldzr6OOFeB1KIqBbKINrGuklsB7t2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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