Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c6bd74650a01abb1b476e65fc4b8c98a395b13161e37e1191a1dd9d0dace6bc' 
  AND token = 'BhS2VNsl0DYwJsVlFl9UHurrKsyshCNg7rkI0HuL9Lo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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