Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '474306e45c1711d869cb4e08535570d4ebd02ced43918e6f8e207ba2ad20eb7d' 
  AND token = '1ErRm7T3bWQl9UBt6wi0ebC6uGNSXMIJzQ06YBiZSGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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