Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd83bb178d502150113c6f58eb48c54c1e4b55af07168a9847f3e354035f1353b' 
  AND token = 'Ihzb7h1K7PFe9Ti8pxoOrtk45+E7HbOiLinfAU67f68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}