Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49c3f5bf1ca044941d86c5522d6f48b0d14a6450459f4d792ab7c9c8a777022a' 
  AND token = 'xzyyxed1rqZ0Pr7RVO1qdXAHB5UHVdQCmJeNsv1lAeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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