Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa89da180040c4b786f5882a8879092ee2cd2a7a2df57d1cd8d27679d5602e9' 
  AND token = 'rXRXfwaa1LNiQlOe3xtKwucm3uDNNFW2uVgVc2KRe+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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