Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de789d36b8645da37534e56a629e5287ac2fe2aac92cc7e43b9b418252dbfd87' 
  AND token = '2B3i7kJlTvIfEyalhz1Ubv5xgdWa10zztVjoGLA0KsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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