Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30d6cf6fded5e4de2c0c6887d5812af9562f70adcc5808035bf144f7b07ff7de' 
  AND token = 'hnWE1wIwyQFSfQ+RGftMZsmDDx7UQmO7DiHqolRGnWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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