Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e66e31d42b9669c9e1200e377f120013e5637016ad85ff27fcd7b3d54163f56' 
  AND token = 'lphSMdavfDotPC6ia9hpfkFOs5i6vt5/rZnBzw4Io+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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