Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31f7b6b1498f1ede572a0392ef7abaaff9e67ee8cd8c992fe971fbc510991f64' 
  AND token = 'KNiQY6xWNstoC2sCf3R3Vs5hvM9w5PyKJhpKb2vCfPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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