Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26ed23d303b908a589b5379b142657538db0ad02bd845bc28d11ac3d059fb7a2' 
  AND token = 'SzPpMFDpEeb3rJ4X7sSft8Rb+rjFSZdkv+iohlmBFGg=' 
  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"
    }
  }
}