Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0faa6ff55ddf83102871dd6721986c3dab43db8c17582ddf30ec246eb6b3c20' 
  AND token = 'AUigjrM2XaRgQSgRxPxiaTqfA7PagtkKxhrvLvmVU3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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