Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'beac979f74f5fd639bd3208974a11855b84dd62775edfe6ed0d173957e451e2a' 
  AND token = 'UVuV+vEE5pO/p3toYBaejgypiQcHL8YU9t6kmwmtdX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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