Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b74683f55de1fcc7381457b436eda54bc3624daa05928c3e810aa9c9ae8095c' 
  AND token = 'cNKT5qSsh5OBcVFppYLC5T9ReQUu+oiRkgRcfE7iTrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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