Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af51143092406d2b8d5d29e34acec9141d270cc46b329df4798402536d34e492' 
  AND token = 'XayTDpaBUOHVfDocQC8S912JcKTPD82do5G7Y4F/EgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}