Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9240c6f2df7ad5354a3474f293ac20390a16779f644a66dec0395b69f67c07ad' 
  AND token = 'swHNxU2+6JEIJRglYOZaK9uOzHc30BO3wo99u028KfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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