Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2701940b6aac5fc73e4f47a82648c641127061bd3b39b0efd2e6f0863c08a9be' 
  AND token = 'zGbvnwd+tF8eMyylBhtUYY+kv6CJBqhue1EPy3i4M/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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