Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05a238419bd4f61906688cea0be0a28e6da23fff355b2ff624c44a3d98dd33ad' 
  AND token = 'oufoeHsVjEV0rJol81NJvVjDWez7q85/uf+Vcy052Rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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