Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53dd176ac2f340f7f5d5ef07b6479d80735ff994160057dcb50892a6143108fc' 
  AND token = 'pj4vhlWe+aC9n1FcM7gc3vs76ku9P06bkBfd+Ury0rI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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