Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e97b0db918ecd143483b9d689bfdc49fb3506297f88761f5a7a9d03578dd864' 
  AND token = 'FVYneLqOTawQ9bkNg4Gnq0bSHR+kGgwdquyC5IDsqDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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