Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '533518245b2c3685217363b8d787c8307672d1ac4e923738a61cb5b66d6896e2' 
  AND token = 'Cat/6dhan/MERwBGrzxnrl0EyNatQ4pxTnJ38wZnomI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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