Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e62042774724125b9fd32a961929b464c5098f82b72995431ae07cbdb052b876' 
  AND token = 'STXlfKsT4t2cb14K8bDc6AANY//mLk/okOSN4F7ZTl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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