Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30450963460f891012642ae721057b0da56853acc115c8642eda5b314569e820' 
  AND token = 'zulfOBvKhuaYX+w1gELML5HeQXYJyaoIihO0k3FxA2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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