Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4344ebe8a20e47fc8782f903f11ffdd66c54832d88fcd57ff102a3b7ab85b9df' 
  AND token = '4Ib4ZDgYRjguN4ZczvfcuenZDbrrgU45lRgydUJuIXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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