SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa70dbc445d41e2ac6ef23b245f01185868cb642d6bd81ab937a2da55652268e' 
  AND token = 'hnoAlNoANhzXhHSFl73/+Y+D7prBY7D2BRqKe29tFAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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