Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43e375360b39f162834bc6d4162bb8554211a385bb2cf8e9a146a432f591c74a' 
  AND token = 'Csd7+aGHKWuzB+CobW9D6WG0YRaxP7pCAc9f1xdpoOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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