Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9487e35eb01438fe6fe610f7cf71c53678b74d8df37c4f05438ce3df6d143e40' 
  AND token = 'QTYh5QJkdSX+nLyZ4VjtulCDMtx8ZGnK6Q2JxaEqmok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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