Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ceea56e9653b6371f0c672a6ed22511349532b01cb4516f6024a700bd8bf981' 
  AND token = 'ErmWJEfL+S0Gi9kNiLR/pC4dKcue50DZ24XpYXW+/2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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