Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ca1350b1680eaf4ce626f0b50fe719e401fe776e5b1d315a6b4e3ad28264448' 
  AND token = '/aai8nGYLRjvZaKwgELdYj2IoDb/PMDg6JtLPnLxn3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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