Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54a0527dd990776eac1d34962d7e111dad46a4c732325b07e78f23e78edd955c' 
  AND token = 'bhCxdins/avhwOct6IP6drk00xzmWAwiPR/tDSVg/xI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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