Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42a719178f2b3bedb0ca041b44105ab26b48474db2090c3e22593075cb247adb' 
  AND token = 'ETjMiaRUPmAKV+EiIPwxXpnLf50N07aDuh8GrVtF4Ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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