Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae1f5633e395037efa3fa3ef4553a085e2ec1fa522aac401031306b69860be2a' 
  AND token = 'vI3uH6X9vs2KcNWmUXeJ6aQCK00EcaIkB50Wqlax4cY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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