Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a283104c855569749bfcadc347224484af8128a7d8ffca2a135eb873121faa8' 
  AND token = 'dK56tly0hmgkgX1Tfhe2Rja8j9Y7UZxyzBBGemBo8aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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