Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '798cd6c45f3f71bc04ce50a4705a145fa3dbf29c058623c48c39e0cf674e06c2' 
  AND token = 'Rwb2L3sGXdCXK7r1Soa0Hv+jB63dzNf8iTV8BIrdeXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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