Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad3e6a995833b21b90c4d2b65472ea5d9ee308c0a5ef9052287cf8b527e91d54' 
  AND token = 'ZbMTXIEq14ALZIjdOqzU8JfUpIzZNQbitorvNhxGD5Q=' 
  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"
    }
  }
}