Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9576fdbed1ab8b4ddf75c59e1e250a2377671040f5a419639cfdcdbd0c211ec' 
  AND token = 'Mdjt/0RF9LcSUvmSQayndsimwmaDQnCUmk/uXTHaLuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}