Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48384ba26c88b290a43c1f65baecdff1ae6d3178817880c2c919aead52b96158' 
  AND token = 'AmWIQdGHSvpTHJnUc+cNm8CjxdCtmTs3M987O1CbbKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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