Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcff020280729f436200001a1f8ab52ec71a167a0137ef7ae870907db214245b' 
  AND token = 'cg4nQ0mWC+tMBrbQ+mFrbHf4jsx0wsTfPnkpzgEkMvI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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