SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2057ff7718065139d9bddecc0542b9d0d34953f82988b89c4db323eaf6f53898' 
  AND token = '+IsYlNzvZPsPRsud/GlCkH6m8Zg0LFn4ZxpoETb50AI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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