Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '404aafdaf7cdcb3becc010fb99c56206c0172e8a938bb247a8dc1d9f357f7a7b' 
  AND token = 'MZDIZZZThMnYcxatOdamsO/8fTc6IzCuvJLSpRWPPZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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