Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9ae2b3dd18e0407e0d94fbc55a6c6a9162ad61e1c5c0bae39d0c7acb38f1319' 
  AND token = 'gicIpAAr5O7oggcD2bzCk0lzFt05CaSOq72WI+uHY1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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