Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3abd61db25b8709423bc1dc03ecfc2b8bdb457a3144c425f3c1b9b5ff1df963e' 
  AND token = 'p7RoCghr5HAYcPGQbC+tk52r0wmOUYLja7DZzDelOos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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