Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd57e61a32a39ae8a27e648068a84cb494a4cb2798884e68881a73c230a46e621' 
  AND token = 'b5uCjQOhPZKd3i9LbQg768qKo0eXP72TpSz9tZ/ymLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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