SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24bc0fd8fde6d3a57129df0aa14741bc015cbbda5e97110290f99bf749d49563' 
  AND token = 'kvb04L+F3WXrUU3UqnABNQMPag7XZUZkmJcYOlhbK6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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