Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b96afee5d946f4316a57e94e63cb9282e884a1782716069dcd7ce24f761a7df' 
  AND token = 'vUT6aOrSr7tppt8w4rit+jbrdaIBT+JEGVVflIBEmVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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