Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e021723f23084aad1ea5faa673e6a97419a37802c31b933ad9287991874f64f3' 
  AND token = 'VnU04pDbnVf0X56DxuYeYPTcq3enYSx0xZqkye+s+Vk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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