Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78e109d458885d35179cd65d7a8f9cbf8ff4ec93491581b0adcff6455c125b36' 
  AND token = 'tirNpoLSajxZjxaHdnOtiAV3Tqo/WzMQ/3+Bzy8bkEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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