Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f6313c3829403dd5d0950a70a6130c8aa34ab388e35c7a2e7aa235950899355' 
  AND token = 'KozpnsgTqzDOV7uQjCwRsggMB27cpStUldb//VWfqH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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