Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dde1681e6d04a9d8984a1fda7cf198aeb9a3737224c2caa37f4daeb7121379f' 
  AND token = '0T4y0db9vsdNUpIDIPYfk2oQM29YYXOgQm5sbw7m9NE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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