Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea657aefe5a03c11e43a336f473e09d98740e7fe452cf9770ec045e4c190d8e4' 
  AND token = 'ZTHPOOF0XHwyL1SMt8OqZH8dLA7aP/6s+NFi+ecef0w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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