Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f5aca36fc14aac7be2cecb421a0df3be2739bab6fc0fe31d8dc57b1bef92d91' 
  AND token = '9nqEfXL1ooF9thEryC6ljbH3SNhVwckSZF6iR79DavQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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