Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da7726d3b3074057df366d450ca2080b5f1d4ae77ce72149c6bdbcb28da849ee' 
  AND token = 'CB03PFQshNCa3pLpgrDHRYWeWYrYw+HzoYZNSEyikFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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