Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b21025b3b948ae1f715891db8bdd3f1cc851075ffb76f6a184c7db3ded14723' 
  AND token = 'AtqQ9hLja7H0XbG9zqXTvcCmn9efmgK5XCb1ZjRDtbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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