Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20f2fb551024f1d38518ecc5c3f409ea11f22a5ab33338adcf95309dc09e7144' 
  AND token = 'CWAMT0rKRDjWzBxEiguoUMyCN7NuBJGi/Oe26B3eHy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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