Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1211c40412af247a0fefc74300bed51590f44a246e3ff62f153010727d328950' 
  AND token = 'lJFnIqerIUNEhYynEsxcjexpq7WZ5+zg72NAtqE+6K8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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