Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '266e83fd8f798c2ac07f06d3bbefb237edf599cda049f1323a98233c57c0d2ef' 
  AND token = 'cBmxahRIyF4C7tQMwlh2EP7LR85e6QfROOU9/yNhRuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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