Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '282dff26530a950f618e8a8ae22c1673fd9d52fdb53de03514bb4dee5d581070' 
  AND token = 'QRk9E79Ht8KVJEhD6DYak4/xhmori96wVJzXxGQdL0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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