Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de709e95a15d25b6622839804b5e6e8830f415ac08ba5b383edd32e9bd0e01be' 
  AND token = '8LialA6UBp86qKtAV+j4LCMnkrFcFkKFfmJlECyr+bc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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