Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c440506a62a5735dea121dd0d90c84f4afde357355640b4a22d0272e8f17bf1' 
  AND token = 'Ba5RNQOuV1T3ZldA5Y3lHn1ezxGA9fElvsWmcyr0y8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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