Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27b08d04e5cdb2603c2712eddd33bc2f2eef63a108944a2fe4c4ef98e81d5161' 
  AND token = 'V6WobjVNkLhkK6zEywV1bpFk4dNVO++waai8VRd7CWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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