Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7719aeaf7814718d10f198dbd2221e1a02e0caf36a70861e9d4bb5a69bd81153' 
  AND token = 'Oany2P4x54ZmpJvDGgx8ZhraYKZjE/EfRVKuMHreLfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}