Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f597a633056ddb62c7bd0656866f27f93d9d60f4e1c5414fce5f8e93a101561b' 
  AND token = 'QMEBSBd3F1bOcE0jZUEJ+znB4JcE79CIdU20q2kjDAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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