Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b82434444bf0418a2b81337f255fc0507fe7144548a3aae87897366cd5b068b' 
  AND token = 'u8aksB4z56LZ68i+4lDd9D8JRKHpMFW/xw8OSIy6EWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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