Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f9bc08cb4211c502dcfc505d56071e46084348e7d2dce705dfc6ca237da1691' 
  AND token = 'sQpPQ08eu+xi2SD3hDq6pXZ8LLmAO78kBOUJl0FJ9k0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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