Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50019e5ea93ef39c2a93dfb53dce55ad9892d83bc79338708e815354e2fe4e60' 
  AND token = 'r83SO7LZUVWh9x5oki2FK9Oq/8mh7PLSvqcHihT4AzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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