Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3326ec6bff2fce8c43a746c51173119280b26e6947229b871a107d2b7db460c' 
  AND token = 'NWJL0c/8n4DZcRIeZ/uMpjChWX5GfqpZVH2Ez1yf5Sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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