Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7727ccb9012f80b639fbf753fad9723986155ac97b93e5d09db8124964b22c5a' 
  AND token = 'Un6l5qPaGndWN3lt0FiEzIL9KVepnxjsgdaf2/EZ88I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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