Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3f4a937ad73cc34b86faa05cf32be86c281b64e09614bea866c4720ecb7c8ed' 
  AND token = 'KkyrHLQS79J6hT7Jhl8o8nOp0pYmcgbvDHPqCkLwOcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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