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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5b9ac7010aef6f93959d2004a920d5f99989a0c950ac15cb0eeb792bbc00004' 
  AND token = 'BkxknCSbZRTOBPgns8/eZOk/icPIcR6nhvyiav/+7co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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