Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'beb41ea5354c5a10a208146d3af8959b571850a30b7d51c35ce77a571ab3237d' 
  AND token = 'ukd4y1vCmjyMPdKw6HwTd69dmMWINoqz5AbC+hnprok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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