Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '228f9dce4f7ae6b80145d12b623820ce6adfdb5ca9f8073fad7c49e66c145671' 
  AND token = 'NAbNynoGuUQRtE0XIz+zzbWxW4zFgGzNExIeyg1keCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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