Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79f3024ecf23c454071a8fa61f63b6d1c070a9f11feccb5c090978c1866bab94' 
  AND token = 'lVGOnITyTV2b4rhwGxlB6Ga5cef2lV0TfYBxuR5NhMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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