Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce5b3769809fce616c7b20ec859a2b224cad065e13e71310a01add0e2fb780e7' 
  AND token = 'LzJle9O/+VCjBNJGJx1vJ7hhA6NVPHNl1YdXKAj6M38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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