Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73638602693742ecef1e106ad844e77865cf2a70643e8fa78183430456fc219c' 
  AND token = 'TAZrZcl8wnkUnOzvuea9tzNc4I94wZHaxk/JIzwhIqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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