Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '200c270d43ba692cb3dc52d025b553301d9af279aa91b0bfe368c7bf786fc4fd' 
  AND token = 'qg9K2qe1Ty9w46U1VpbleOZOCujL/mahmrDQ3okDHwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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