Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b80cfd68f3b7ed780a34dbf0c76caedfd62835f3d44c083a0d3a869265d1fe85' 
  AND token = 'JDnZ8LbfHWeRex2sYZd/Vi/z35pLHwImLjlY+f24EmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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