Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ba1264a774215013aa059ec0cec97a64c087b33006cc9e84bf1cf6c83ffa275' 
  AND token = 'bxnOWekCFFD08+Gkjwb4yy44YAz4hMKuQhrxdz/zrcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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