Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5aa9ded05ff1b07a58c82c31f9aa3523d3c28223dd9fd92d7d6fd88965c2616' 
  AND token = 'J98uwOUazBZJbxEgeyUAbQwZWU7lvnmyOzUGXRyXRYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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