Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '35595fc12ef9f29f2689e314fca9e7eedae4ccc3fb9dc6dd403e71928af83f56' 
  AND token = 'XesUUoW7ondSE5jEcvr/xdNxjy3X5VnaO+fCGXUCxL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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