Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1353ea133955ab580e610ffd27e777670916ce849745bc04058e94f1440df15a' 
  AND token = 'I1fJGAHbkO5pUf3RtywMKDsv9J+raS7TroSJEJV8ncI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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