Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2692082284d8b3f0dcb3d9f737cf9e42291d205b31d2f4d9f806feb0713adc28' 
  AND token = '/I85eXu21r4k/Yoq39PABTeYBk2B1EfWZAO8yicMo1U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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