Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f73876210deffdaef89999ab3114a9a9badcfe2cb7cff9f755ebeda05b8db2a' 
  AND token = 'tPRE9zIj6SniCav3CclMzVqmRr/uQU1IOd1NeiU24/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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