Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '178d95697ac58ef0fdc2cd0778f8a6156f713442ad3d104d57e46d0a79ba69ac' 
  AND token = 'LQf0pvi4hMn7Sgtx4paaKwKvwnon1xKboSQU6kqcDc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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