Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2ed66914da33999a28c2d2ed80c2078a156a6f25be77ed5e40f96b899eb6f00' 
  AND token = 'kGvPvzZL5MzV2/rK6Y9HpyR5m23AQJeOIA+zno8i4nI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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