Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca5a5102db702d1277558fe5c311f62866ac600327f01ab6fc3fda052235e700' 
  AND token = 'eIBTXU8vY5yuw0VCJQ6VyCD8JbrNl7rJufPS6rtZKhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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