Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '663738478c6d8533ee81a7b32cb1971c7873702a8718290ea1ffbc6e73f2bb7d' 
  AND token = 'AQK5tt2QtgXYV1DNRTZsgEsGev8uaRdQ9OwlUXf+EPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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