Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f22e1495d7c8b6120ec63f4973a23a5ca8b3994f037a564a5b4aa508d0531b80' 
  AND token = 'Btn/oTQ4cBwpocQt1qC9bbfE853BunTdV5EFGxQ6pDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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