Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0374fdc1c12e736936d7370dda01535e836a066e30434784e28e2499f0f273f4' 
  AND token = 'NOn9l/E6DH+PGErcl7C4rqwIaZlKf3hJ4qU+72VAxVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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