Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '052fadfdedde4488da884d4a918d0c7645ff0d37fc5b743494b92c990650cf2b' 
  AND token = 'IG/rr9BfffQfoIrKeJZx9LQExaqJ82hFTM9q57DpCSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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