Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f69878f54067efe40ebca5e50fafc8f163ad01de5491037544ffccd873cb66b7' 
  AND token = 'jssfXhfDCuxNJfTOiaKqAPTqyiYMD+ppPSO/sfAuVRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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