Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f87495d282bca6b6c6ab8154736d4111dd562977b64c71721e29e9f77e72aac' 
  AND token = '8mEwO/nuHs3cILCGiT8gLRIfkMro9pD0ABMCU0GHt6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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