Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2f6cfc02f4addc3442bc5680c2e27897abb9369d205da1cfd6c347d805170fe' 
  AND token = 'VWB0AwWXtl9RtfMUUWfw4cKQcQSMKHAwvmj/GoPdl68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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