Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd868d5214e5822f329812fd7bf31a6bf638a6315c5925652bccd7d57b07cd8ed' 
  AND token = 'RV0TorFmhfIRyNFlcFbn/Tqx6KZJktI2gbemBT/SZw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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