Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caa69214323ce1597301e28322c4f08cbfb33632d267de7cd9b977365116014a' 
  AND token = 'du0M1AkAfzPYzFUV9b6Nktdn99ueBJ+uKQ2q1fjCwd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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