Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d6e9c0995d73ab8755edd69146bfc9e32bcb0e0f21b0770cb042794ba6aea37' 
  AND token = 'yiYRsCYE1GUKPOmsf2BEDhmgDUk7E6Yd313ddFktWyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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