Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddcca57fac4d9779006a5cadb30c9f735bfee48a240330813f1fd033ed72bb3d' 
  AND token = 'Krey1SerNXyoHuHNEjV2i8BER6VVdX87QyUiartbn/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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