Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1f1b38106185d120b57deab8d9887ba50b37144cf7cda848dfbd527d5e94a5b' 
  AND token = 'IyiSLLvQh7mD1688Ge9ciBFT+Gco2gJQ64svDYV8qko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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