Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42e3a63845b72fe1529ef51477aa955783e1ec5a282466d270aa28051a933cd6' 
  AND token = 'CRvIERDr0dlDZDhMlK5X4LVsLFRbBdlC25JHy5UXfc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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