Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '136c3ab5595e45e976ff23bc0d3c2a72db6ec1cba3e39540d65118c39cca4e74' 
  AND token = 'mn0bnxsckx64zzo1tzbBEIdthHd3Y5zQfAF0g/eA3Vg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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