Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61e6d80a352e7a092753827ebb03a4a39a7ddc5662fa6c20199021cf62029f05' 
  AND token = 's3CgZzMY4f/T6LEka25XAYrAJlJaeKlEY6FAO3YvYS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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