Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '213a0d8b67cc0946bf859c007349a014188857401c17604ea5fd7f8953ad0c70' 
  AND token = 'Lx6AEi+HaFw7eD0pYplSRVoBY5LB4qj1kbYO16EpItc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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