Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79c511cd9173afe10cbf8f9e6b73f388e25a8a966cbe05d550e01bebe4472ca2' 
  AND token = 'V2GPtYmGp+KFg2oaOheitn6PB4a21DPLVPEV7b5V4Wc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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