SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1464752148d8c24561afa6577eb8d1152298250df63b5f1e796f3f9bff1e09f1' 
  AND token = 'NXAL4+WrXc8Sam+lCbGizj5FqZV8QYvA5l05DjDdX6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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