Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '110a98317f923ee1854fba5617fcd1502b447b64a42618b987d1058558ea4ede' 
  AND token = '1Eb0YLXpjlDUF64I2ME4E675Pi6MIKlZpe+Yj21Ivys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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