Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c777110a97caf48d513e9e486877dee1a47d525bb0c6126ac01623db5cac976b' 
  AND token = '9osSlJnPbWKvj75bpHtB/+Go9XaHAgOY3KAYoFPTL8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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