Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4d99a5fe95828f2e5dae61c7436ad35fa65df69d858ea5fa0918548677dd8b7' 
  AND token = '6vRJLuLyM0UuLJWYpWJ4cAW+3/0p7g75y85xMTE94ug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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