Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0be9193ce4772bf5ea73f11b336ceba0f794d7b0179ab25f0ca305d08ed779e1' 
  AND token = 'm6TToE5nLTbyuqQPUFLzxGUf0McGErMxYeLRriY/nIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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