Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '801934c19b4fe42b80582feaefecf8131e9ee5d0c01e6ba573f6bbbe428312d8' 
  AND token = 'FwhZprJ38CNZBITazYDuFB5PM5ouuOJvcxfPnelcX6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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