Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3101bf095d12dcf9eb2f1d46bc90b09cf03ad771bca2fa2a18b23f77d70766d4' 
  AND token = 'QdW2D7GocpzKVSx6L8F4VkllDSyhOkkJuIiIplx2gVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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