Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32aa5f5e6f7ae4bcf1bf19941f280928081bd0cfbb5d3a17621cac23d27970a2' 
  AND token = '6yjUtyXSqFEKLhEbnJ1S1d2ILaJi0tponT6MzQL6apo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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