Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf9d9f19e08b2c0c1c33c58f6f1e6c41fa433e7a451ff586a886366d6448c3ff' 
  AND token = 'yIhtgvkTCWkNw1XbUEvU31FSCa0D129pY9wdXuOapP4=' 
  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"
    }
  }
}