SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '041b71c2a34412eb0dd882b4bdc5492b73230b7a7632b20b6114c75119956f81' 
  AND token = 'GiPVAF4X+I6CTM+Su5FOlI/jQ3kUzgO705mIqXh6gpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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