Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec7fced5e44b82e4c6d86a1ad8a4b8161432bb7dd1acbcf945653324f36161c2' 
  AND token = 'krK3QD99r7yJrIf62OBiMUGQJTcHDRokNl9LR5EAXGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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