Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ce4b2a8eceb258d6555dfbe6d1d07ae5f2ba78230c72365b526a6a8b748217' 
  AND token = '9aZjpn7ZiuGC9ccsH7YW+UYpSnduQY8LYHa/5ht47cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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