Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a67b556d1f66db7423e9d7c1c97beb8fa495da7d3c45be48824bc54e81842309' 
  AND token = 'WfPdQJfR97kU9J18KlsVVwGJcSslmtbYo210lJJr7Ss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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