Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba804af4b05733563e0cf5623439026227e67f0deead2c2ecf2e5e840e0f5341' 
  AND token = 'WLmCk1nK3v+Vg7Y2wrYep9073n95fJr+UkDlFlCMbE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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