Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e08f9526c02d505218bed9a3cfd8b13ddbb98f743d047e86204aba919e231d6' 
  AND token = 'lwuaua8OgdHIT3uNxg8YFdGNTqcg99gkYuDUhuQ6jfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}