Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bb6e86dd52b9173b45027bc2f0d46f67c84cfc58f55ffa4f22d1492f1cd4a47' 
  AND token = 'SuisbHxpQUsh5U/84W8mjTY82AMUaTkIcA+LPLbUy2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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